Fukagawa Hachiman Matsuri 2026: Tokyo's Water-Splashing Festival Returns in Full — Once Every Three Years

Most Tokyo festivals ask you to watch politely from the roadside. This one hands you a bucket. The Fukagawa Hachiman Matsuri (深川八幡祭り) — one of the city's three great festivals, alongside Kanda and Sanno — is nicknamed the mizukake matsuri, the water-splashing festival, because the crowd's job is to drench the shrine-bearers as they pass. And 2026 is the year to see it: the full-scale hon-matsuri, held only once every three years, runs August 12–16, climaxing on Sunday the 16th when 54 portable shrines parade 8 kilometers through the old downtown streets east of the Sumida River.

A festival with 380 years of history

The festival is the annual rite of Tomioka Hachimangu, the grand shrine of the Fukagawa district in Koto-ku, and it has been celebrated since the 1640s — back when Fukagawa was a riverside town of lumber yards, boatmen and fish markets serving the shogun's capital. It still has that shitamachi (old downtown) soul: the festival is run street by street, each neighborhood carrying its own mikoshi — a gilded portable shrine in which the deity rides through the town to bless it — to the rolling chant of "Wasshoi! Wasshoi!"

In ordinary years the celebration stays modest. But every third summer comes the hon-matsuri, the main festival, when every neighborhood brings its mikoshi out at once. The last was 2023; the next after this is 2029. If you are in Tokyo this August, you happen to be here for the one that counts.

Why everyone throws water

Carrying a one-ton mikoshi through an August afternoon in Tokyo is brutally hot work — and in Shinto, water purifies. The Fukagawa festival merges the two ideas into its famous custom: as the bearers pass, spectators hurl purification water over them — from buckets and basins, garden hoses, children's water pistols, and at the big intersections, full blasts from local fire-brigade pumps. The bearers roar back their thanks, the drums keep time, and for a few hours the whole district becomes a joyful water fight between the town and its gods.

This is not a spectator-only custom. Stand near the route and someone will likely hand you a bucket, or at least splash you in passing. Come in clothes that can get wet, protect your phone in a zip bag, and consider it a blessing — that is exactly what it is meant to be.

How to enjoy the big Sunday

• Go early. The joint procession sets out from the shrine in the morning (around 7:30) and winds through the district for most of the day. Morning light, cooler air and fresher bearers make the first hours the best.
• Pick a spot on the route, not at the shrine. The area right in front of Tomioka Hachimangu is the most crowded. A block or two along Eitai-dori — or near Eitai Bridge, where the mikoshi cross with the Sumida River behind them — gives you the same spectacle with room to breathe.
• Dress to be splashed: quick-dry clothes, sandals, a towel, and your phone in a waterproof pouch. Vendors along the route sell drinks and festival food all day.
• Listen for the chant. Each team's "Wasshoi!" has its own rhythm; locals say you can tell the neighborhoods apart with your eyes closed.
• Make a half-day of Fukagawa: the serene Kiyosumi Teien garden, the Fukagawa Edo Museum's recreated 1840s streets, and monk-made Fukagawa-meshi (clam rice) are all nearby.

Obon week in Tokyo — the city at its most relaxed

The festival lands in the middle of Obon week (around August 13–16), when many Tokyoites travel to their hometowns to welcome the spirits of their ancestors home. The result for visitors is a rare gift: the trains breathe, the lunch queues shorten, and the city softens — while the festivals burn brighter than at any other time of year. Watching a neighborhood that stayed behind pour its heart (and its water) into carrying the local deity through the streets, you see the side of Tokyo that guidebooks struggle to explain: it is really a collection of villages, and in mid-August the villages come out.

See it like a local, not a tourist

From NAOKO'S HOMESTAY in Yushima, the Oedo Line takes you from Ueno-okachimachi straight to Monzen-nakacho — about 20 minutes door to door, no transfers. Go in the morning, get gloriously soaked, and be back in quiet Bunkyo-ku for an afternoon rest before the evening drums start somewhere near you. Fully furnished stays from ¥9,000/night, with the best rates on 1–2 month stays — and a washing machine for your festival clothes.

“You feel like you're living in Tokyo, not just visiting.” — Tatyana, Portugal (stayed with her son)